Sound travels about 4 times faster in water than in air.
408
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
The storage capacity of human brain exceeds 4 Terrabytes.
140
Pumice is the only rock that floats on water.
14
The only letter not appearing on the Periodic Table is the letter "J".
180
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Nylon is made from coal and petroleum.
42